parking brake LEXUS SC300 1991 Service Owner's Guide

(b) Check the brake drums for scoring or wear.
Maximum drum inside diameter:191 mm (7.520 in.)
(c) Clean the brake parts with a damp cloth.NOTICE: Do not use compressed air to clean the brake
parts.
(d) Seat the parking brake shoes during the road test (item 25) in do the following:
wDrive the vehicle at approx. 50 km/h (30 mph) on a safe,
level and dry road.
w With the parking brake release buttom pushed in, pull on
the lever with 88 N (9 kgf, 20 lbf) of force.
w Drive the vehicle for approx. 400 meters (1/4 mile) in this
condition.
w Repeat this procedure 2 or 3 times.
w Check parking pedal travel.
If necessary, adjust the parking brake.
16. INSPECT AND CHANGE BRAKE FLUID
(a) Visually inspect the master cylinder for leaks.
(b) Change brake fluid (See BR section)
Fluid: SAE J1703 or FMVSS No.116 DOT3
MA04F±01
CHASSIS
17. INSPECT STEERING LINKAGE
(a) Check the steering wheel freeplay.
Maximum freeplay:30 mm (1.18 in.)
With the vehicle stopped and pointed straight ahead, rock the
steering wheel gently back and forth with light finger pres-
sure.
(b) Check the steering linkage for looseness or damage. Check that:
wTie rod ends do not have excessive play.
w Dust seals and boots are not damaged.
w Boot clamps are not loose.
±
MAINTENANCE (1UZ ± FE)MA±13
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ViscosityAbove ± 185C (05F) SAE 90
Below ± 18 5C (0 5F) SAE 80W±90 or 80W
Capacity:
1.35 liters (1.43 US qts, 1.19 lmp. qts)
(e) Reinstall the filler plug securely.
23. TIGHTEN BOLTS AND NUTS ON CHASSIS AND BODY Tighten the following parts.
wFront seat±to±body mounting bolts
Torque: 37 N Vm (375 kgf Vcm, 27 ft Vlbf)
w Front suspension crossmembers - to - body mounting
nuts and bolts
Torque:
127 N Vm (1.300 kgf Vcm, 94 ft Vlbf) for nut
201 N Vm (2,050 kgf Vcm, 148 ft Vlbf) for bolt
w Rear suspension member - to - body mounting bolts
Torque: 176 NVm (1,800 kgfVcm, 130 ftVlbf)
wRear suspension member rear cushion - to - body
mounting bolts
Torque: 38 N Vm (390 kgf Vcm, 28 ft Vlbf)
24. BODY INSPECTION
(a) Check the body exterior for dents, scratches and rust
(b) Check the underbody for rust and damage.
If necessary, replace or repair.
25. ROAD TEST
(a) Check the engine and chassis for abnormal noises.
(b) Check that the vehicle does not wander or pull to one side.
(c) Check that the brakes work properly and do not drag.
(d) Perform setting of the parking brake shoes and drum.
±
MAINTENANCE (1UZ ± FE)MA±17
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19. BRAKE PEDAL
(a) Check that pedal for smooth operation.
(b) Check that the pedal has the proper reservedistance and freeplay.
(c) Check the brake booster function.
20. BRAKES At a safe place, check that the brakes do not
pull to one side when applied.
21. PARKING BRAKE
(a) Check that the pedal has the proper travel.
(b) On a safe incline, check that the vehicle is held securely with only the parking brake applied.
22. A U TO M AT I C T RANSMISSION PARK
MECHANISM
(a) Check the lock release button of the selector lever for proper and smooth operation.
(b) On a safe incline, check that the vehicle is held securely with the selector lever in the ªPº
position and all brakes released.
MA00T±0A
UNDER HOOD
23. WINDSHIELD WASHER FLUIDCheck that there is sufficient fluid in the tank.
24. ENGINE COOLANT LEVEL
Check that the coolant level is between the
LEVEL lines on the see±through reservoir at
normal temperature (20 5C (68 5F)).
25. RADIATOR AND HOSES
(a) Check that the front of the radiator is clean and not blocked with leaves, dirt or bugs.
(b) Check the hoses for cracks, kinks, rot or loose connections.
26. BATTERY ELECTROLYTE LEVEL
Check the indicator.
When the indicator color is blue, the condition
is satisfactory. A red color indicates that dis-
tilled water must be added, and white indicates
that charging is necessary. 27. BRAKE FLUID LEVEL
Check that the brake fluid level is near the up-
per level line on the see±through reservoir.
28. ENGINE DRIVE BELT Check drive belt for fraying, cracks, wear or oili-
ness.
29. ENGINE OIL LEVEL
Check that level on the dipstick with the engine
turned off.
30. POWER STEERING FLUID LEVEL Check the level on the dipstick.
The level should be in the ªHOTº or ªCOLDº
range depending on the fluid temperature.
31. AUTOMATIC TRANSMISSION FLUID LEVEL
(a) Park the vehicle on a level surface.
(b) With the engine idling and the parking and foot brake applied, shift the selector into all
positions from ªPº to ªLº, and then shift into ªPº.
(c) Turn and pull out the dipstick and wipe off the fluid with a clean rag.
Re±insert the dipstick fully and check that the
fluid level is in the ªHOTº range.
(d) Perform this check with the fluid at normal driving temperature (70 ± 80
C (158 ± 176
F)).
If the level is at the low side, add fluid.
NOTICE: Do not overfill.
HINT: Wait about 30 minutes before checking
the fluid level after extended driving at high
speeds in hot weather, driving in heavy traffic
or with a trailer.
32. EXHAUST SYSTEM Visually inspect for cracks, holes or loose sup-
ports.
If any change in the sound of the exhaust or
smell of the exhaust fumes is noticed, have the
cause located and corrected.
MA±20
±
MAINTENANCE (1UZ ± FE)
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WIRING DIAGRAM
CIRCUIT INSPECTION
Parking Brake Switch Circuit
CIRCUIT DESCRIPTION
When the parking brake is operating, the parking brake switch sends a signal\
to the ECU. When this signal
is input to the ECU during tilt & telescopic, the ECU cancels tilt & tel\
escopic.
DIAGNOSTIC CHARTDIAGNOSTIC CHART
SR±96±
STEERING STEERING COLUMN
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OKNG
NGOK
NGOK
OKNG
INSPECTION PROCEDURE
1Check operation of brake warning light.
Check that the brake warning light in the instrument panel comes on when the \
parking brake is opera-
tion with the engine running, and the light goes off when the parking brake is not operating.C
Check brake warning light circuit.
2Input signal check.
C
OK
1. See input signal check.
2. Check the indicator light when the parking brake isoperating.
The indicator light goes off when the parking brake
is operating.
Proceed to next circuit inspection shown on matrix
chart.
3Check voltage between terminal PKB of tilt & telescopic ECU connector and bod\
y ground.
C
OK
PRemove tilt & telescopic ECU with connectors still con-
nected.
1. Turn ignition switch ON.
2. Measure voltage between terminal PKB of tilt & telescopic ECU connector and body ground, when
the parking brake lever is operating.
Proceed to next circuit inspection shown on matrix
chart.
4Check for open in harness and connector between tilt & telescopic ECU and brak\
e warning light
(See page IN±33).
.
Repair or replace harness or connector
Check and replace tilt & telescopic ECU.
±
STEERING STEERING COLUMNSR±97
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TERMINAL OF ECU
TILT & TELESCOPIC ECU
 




Terminal
No.
 




Symbol
 




Terminal Name
 




Terminal
No.
 




Symbol
 




Terminal Name
 T9±1 Si Serial In T9±16 MSW Manual Switch
 2 DSW Door Courtesy Switch 17 Vc Sensor Power Source
 3 M1 Return Switch 1 18 ECU±B Power Source 

4
 

ASW
 

Auto Switch
 

T10± 1
 

IG
 

Ignition Switch
 5 E1 Sensor Ground 2 Te M+ Telescopic Contracted
 6 Te S Telescopic Sensor 3 TiM± Tilt Down
 
7 
TiS 
Tilt Sensor 
4 
+B 
Power Source 

8
 

ECU±E
 

Ground
 

6
 

P
 

Park/Neutral Position Switch
 9 So Serial Out 6 P Parking Brake Switch*
 10 UWSW Unlock Warning Switch 7 GND Ground 

11 

MRY 

Memory Switch 

10 

TiM+ 

Tilt Up
 12 M2 Return Switch 2 11 TiM± Telescopic Extended
*
SC300 (M/T) Models
SR±48
±
STEERING STEERING COLUMN
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TORQUE SPECIFICATIONS
SA0WG±03
(FRONT)
\
 \
Part tightened NVm kgf Vcm ft Vlbf
\
 \
Hub nut 103 1,050 76
\
 \
Front and rear adjusting cam bolt 226 2,300 166
\
 \
Axle hub lock nut 199 2,030 147
\
 \
Lower ball joint X Steering knuckle 125 1,270 92
\
 \
Tie rod end X Steering knuckle 49 500 36
\
 \
Steering knuckle X Upper suspension arm 103 1,050 76
\
 \
Lower ball foint X Lower suspension arm 127 1,300 94
\
 \
Disc brake caliper X Steering knuckle 11 8 1,200 87
\
 \
Speed sensor set bolt 103 80 76 in. Vlbf
\
 \
Front shock absorber X Body 35 360 26
\
 \
Front shock absorber X Lower suspension arm 143 1,460 106
\
 \
Upper suspension arm mounting nut 164 1,670 121
\
 \
Piston rod lock nut 29 300 22
\
 \
Stabilizer link X Lower suspension arm 74 750 54
\
 \
Stabilizer link X Stabilizer bar 74 750 54
\
 \
Stabilizer bar bracket X Body 18 180 13
\
 \
Steering knuckle X Disc brake dust cover 19 195 14
(REAR)
\
 \
Part tightened N Vm kgf Vcm ft Vlbf
\
 \
Shock absorber X Lower suspension arm 143 1,460 106\
 \
Upper arm X Body 164 1,670 271\
 \
Rear axle carrier X Brake caliper 104 1,065 77\
 \
No. 1 lower arm X Rear axle carrier 59 600 43\
 \
No. 1 lower arm X Body 184 1,880 136
\
 \
No. 2 lower arm X Rear axle carrier 150 1,525 11 0
\
 \
No. 2 lower arm X Body 184 1,880 136
\
 \
Strut rod X Rear axle carrier 184 1,880 136
\
 \
Strut rod X Body 184 1,880 136
\
 \
Rear drive shaft X Axle hub 289 2,950 213
\
 \
Upper ball joint X Rear axle carrier 109 1,110 80
\
Parking brake backing plate X Rear axle carrier2626019\
 \
Rear drive shaft X Differential 83 850 64\
 
\

\
Differential mounting bolt \
Front
Rear 

147
142 

1,500
1,450 

108
105
\
 \
Differential carrier cover set bolt 47 475 34
\
 \
Suspension support X Body 27 280 20
\
 \
Suspension support X Shock absorber rod 27 280 20
\
 \
Stabilizer bar link nut 74 750 54
\
 \
Stabilizer bar bushing retainer bolt 28 290 21
±
SUSPENSION AND AXLE SERVICE SPECIFICATIONSSA±129
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5. REMOVE DRIVE SHAFT LOCK NUT
(a) Install the brake disc and caliper.
(b) Remove the cotter pin and lock cap.
(c) While applying the brakes, remove the nut.
(d) Remove the brake caliper and disc.
6. REMOVE DRIVE SHAFT(See page SA±66)
7. REMOVE PARKING BRAKE SHOE
(See page BR±44)
8. REMOVE ABS SPEED SENSOR Remove the bolt and ABS speed sensor.
9. REMOVE REAR AXLE HUB WITH CARRIER
(a) Remove the 2 bolts.
(b) Remove the 2 bolts.
(c) Remove the hexagon bolt.
±
SUSPENSION AND AXLE REAR AXLE HUBSA±53
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(d) Slide the backing plate to the outside and disconnect theparking brake cable.
(e) Remove the bolt and nut and disconnect the strut rod.
(f) Remove the nut.
(g) Using SST, disconnect the No.1 lower suspension arm. SST 09628±10011
NOTICE: Be careful not to damage the dust boot.
(h) Remove the nut.
SA±54
±
SUSPENSION AND AXLE REAR AXLE HUB
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(c) Connect the No. 1 lower suspension arm to the axle carrierwith a new nut.
Torque: 59 N Vm (600 kgf Vcm, 43 ft Vlbf)
(d) Connect the strut rod to the axle carrier and temporarily install
the bolt and nut.
(e) Connect the parking brake cable.
(f) Slide the backing plate to the inside.
(g) Install the hexagon bolt.
Torque: 180 N Vm (1,825 kgf Vcm, 132 ft Vlbf)
(h) Install the 2 bolts.
Torque: 26 N Vm (260 kgf Vcm, 19 ft Vlbf)
±
SUSPENSION AND AXLE REAR AXLE HUBSA±59
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